EP1323512B1 - Reifenformwerkzeug und Reifenherstellverfahren - Google Patents
Reifenformwerkzeug und Reifenherstellverfahren Download PDFInfo
- Publication number
- EP1323512B1 EP1323512B1 EP02028490A EP02028490A EP1323512B1 EP 1323512 B1 EP1323512 B1 EP 1323512B1 EP 02028490 A EP02028490 A EP 02028490A EP 02028490 A EP02028490 A EP 02028490A EP 1323512 B1 EP1323512 B1 EP 1323512B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- pitch
- tire
- pattern
- tread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000011295 pitch Substances 0.000 claims description 38
- 230000008961 swelling Effects 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 14
- 239000011324 bead Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0318—Tread patterns irregular patterns with particular pitch sequence
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D30/0629—Vulcanising moulds not integral with vulcanising presses with radially movable sectors
Definitions
- the present invention relates to a mold for a pneumatic tire having a variable-pitch tread pattern, more particularly to a sidewall molding surface associated with the variable pitches to improve tire uniformity
- the present invention further relates to a method for manufacturing a pneumatic tire.
- a pneumatic tire such as passenger car tire and RV tire is provided in the tread portion with a tread pattern which is formed by repeating a pattern unit in the tire circumferential direction at variable pitches in an elaborate sequence to reduce noise.
- a mold according to the preamble of claim 1 is known from EP-A-0 451 832. Another mold is known from JP 08 216154 A. EP-A-1 016 556, EP-A-1 106 396, JP 60 189611 A and JP 2000 043522 A each disclose a vehicle tire.
- pneumatic tire 1 comprises a tread portion 2, a pair of axially spaced bead portions 4 each with a bead core 5 therein, a pair of sidewall portions 3, a carcass 6 extending between the bead portions 4, and reinforcing cord layers including at least a tread belt 7 disposed radially outside the carcass 6 in the tread portion 2.
- the carcass 6 comprises at least one ply, in this example only one ply 6A of cords arranged radially at an angle of from 70 to 90 degrees with respect to the tire equator and extending between the bead portions and being turned up around the bead cores 5 so as to form a pair of turned up portions 6b and a main portion 6a therebetween.
- the belt 7 comprises at least two cross plies 7A and 7B of substantially parallel cords laid at an angle of from 10 to 35 degrees with respect to the tire equator.
- the tread portion 2 is provided with tread grooves 9 to form a tread pattern such as block type pattern (blocks only) and rib-block type pattern (rib and blocks).
- the tread pattern may include a row of blocks 11 divided by circumferential grooves and axial grooves, a circumferentially continuous rib 10 or the like.
- the tread portion 2 is divided into a central rib 10 on the tire equator c, and two circumferential rows 11R of blocks 11 on each side of the rib 10.
- the tread pattern is formed by repeating a pattern unit E around the circumference of the tire at variable pitch lengths P. It may be said that the larger the pattern unit, the larger the total volume of the tread element such as block and rib.
- the number of kinds of the different pitch lengths P is three, namely, a maximum pitch length Pl, a minimum pitch length Ps and a middle pitch length Pm.
- the largest pattern unit El having the maximum pitch length Pl, the middle-size pattern unit Em having the middle pitch length Pm, and the smallest pattern unit Es having the minimum pitch length Ps are arranged in a specific sequence so that the largest pattern unit El does not come next to the smallest pattern unit Es in order to prevent uneven wear.
- Fig.3a shows an example of such sequence.
- a tire vulcanizing mold 20 is designed to improve TFV.
- the vulcanizing mold 20 has a surface T for molding the tread portion 2 (hereinafter, the tread molding surface T) and a surface S for molding the sidewall portion 3 (hereinafter, the sidewall molding surface S) as shown in Fig.9.
- the tread molding surface T is provided with the negative pattern of the above-mentioned tread pattern, namely, protrusions corresponding to the tread grooves and dents (b) corresponding to the tread elements such as block and rib.
- the sidewall molding surface S is imaginary divided into sector regions S having corresponding pitch variation (pitch angle variation).
- the sector regions S in this example are: a largest sector region sl corresponding to the largest pattern unit El and extending radially inwards from the axial edge thereof; a middle sector region Sm corresponding to the middle-size pattern unit Em and extending radially inwards from the edge thereof; and a smallest sector region Ss corresponding to the smallest pattern unit Es and extending radially inwards from the edge thereof.
- the largest sector region Sl (in solid line) swells towards the mold cavity J when compared with the smallest sector region Ss (in imaginary line).
- the amount H1 of maximum swelling is set in a range of from 0.1 to 1.0 mm, preferably 0.1 to 0.5 mm in the tire axial direction.
- the swelling region Y is designed to include at least a region Y0 ranging from 0.6 time to 0.8 times the section height HT of the mold cavity J which corresponds to the tire section height from the bead base line BL.
- the swelling region Y is at most such a region Y1 that ranges from 0.4 time to 0.8 times the section height HT.
- the degree of the swelling is in between them in proportion as the pitch length P.
- the middle sector region Sm corresponds thereto, and it is, as shown in Fig.6, formed as a slant face smoothly connecting the largest sector region Sl and the smallest sector region Ss, while bridging a step or surface level difference therebetween.
- the inside of the raw tire is pressurized by using an inflatable tube or bladder, and the tread rubber is pressed onto the tread molding surface T.
- the tread rubber enters into the dents (b).
- the carcass ply 6A is slightly moved towards the dents (b) and small undulation (el, em, es) is caused on the carcass 6.
- the pitch length P becomes longer, the volume of the dent becomes larger, and as a result, the movement becomes larger.
- the carcass cord tension tl, tm and ts therein are varied in proportion as the undulation, namely, tl>tm>ts.
- the difference of the carcass cord path Ll between the bead cores at the pattern unit El from the carcass cord path Ls that at the pattern unit Es becomes about 0.5 to about 2.0 mm. Therefore, as the finished tire is inflated in use, the tension of the carcass cords increases, and the elongation of the carcass cords becomes larger at the pattern unit E having the smaller pitch because the tension in the mold is smaller.
- the level of the tread face becomes uneven and TFV increases.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tires In General (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Claims (6)
- Form für einen Luftreifen, wobei der Luftreifen umfasst: ein Paar Wulstabschnitte (4), ein Paar Seitenwandabschnitte (3) und einen Laufflächenabschnitt (2), der mit einem Laufflächenprofil versehen ist, das gebildet ist, indem eine Profileinheit (E) um den Reifen herum bei mehreren Arten von Teilungen (P) in einer Abfolge wiederholt ist, wobei die Form (20) umfasst:eine Seitenwandformfläche (S) für einen der Seitenwandabschnitte (3) undeine Laufflächenformfläche (T), die mit dem negativen Laufflächenprofil versehen ist, das das negative Laufflächenprofil umfasst, das bei den mehreren Arten von Teilungen in der Abfolge wiederholt ist, um das Laufflächenprofil zu formen,dadurch gekennzeichnet, dass
die Seitenwandformfläche (S) Sektorbereiche (Sl, Sm, Ss) umfasst, die als sich jeweils radial nach innen von den Profileinheiten weg erstreckend definiert sind, wobei
die größten Sektorbereiche (Sl) als sich von den Profileinheiten mit der größten Teilung weg erstreckend definiert sind und
in Richtung eines Hohlraumes (J) der Form (20) im Vergleich mit den kleinsten Sektorbereichen (Ss), die als sich von den Profileinheiten mit der kleinsten Teilung weg erstreckend definiert sind, anschwellen. - Form nach Anspruch 1, wobei
die maximale Schwellung (H1) in einem Bereich von 0,1 bis 1,0 mm in der axialen Richtung liegt. - Form nach Anspruch 1, wobei
der anschwellende Teil im Bereich des 0,6-fachen bis 0,8-fachen der Reifenquerschnittshöhe (HT) von der Wulstbasislinie (BL) liegt. - Form nach Anspruch 1, wobei
die mehreren Arten von Teilungen mittlere Teilungen zwischen der kleinsten Teilung und der größten Teilung umfassen und
die mittleren Sektorbereiche (Sm), die als sich von den Profileinheiten mit den mittleren Teilungen weg erstreckend definiert sind,
in Richtung des Hohlraumes (J) der Form (20) im Vergleich mit den kleinsten Sektorbereichen (Ss) anschwellen und
der Betrag der Schwellung derart ist, dass der Betrag der Schwellung umso größer ist, je größer die Teilung ist. - Form nach Anspruch 1, wobei
die mehreren Arten von Teilungen eine mittlere Teilung zwischen der kleinsten Teilung und der größten Teilung umfassen und
die mittleren Sektorbereiche (Sm), die als sich von den Profileinheiten mit den mittleren Teilung weg erstreckend definiert sind,
in Richtung des Hohlraumes (J) der Form (20) im Vergleich mit den kleinsten Sektorbereichen (Ss) anschwellen und in dem anschwellenden Teil davon der Betrag der Schwellung sich von dem kleinsten Sektorbereich (Ss) zu dem größten Sektorbereich (Sl) allmählich ändert. - Verfahren zum Herstellen eines Luftreifens mit einem Paar Wulstabschnitte (4), einem Paar Seitenwandabschnitte (3) und einem Laufflächenabschnitt (2), der mit einem Laufflächenprofil versehen ist, das gebildet wird, indem eine Profileinheit (E) um den Reifen herum bei mehreren Arten von Teilungen (P) in einer Abfolge wiederholt wird, wobei das Verfahren die Schritte umfasst, dass ein Rohreifen hergestellt wird und der Rohreifen in der Form (20) nach einem der Ansprüche 1 - 5 vulkanisiert wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001394749 | 2001-12-26 | ||
JP2001394749A JP3996390B2 (ja) | 2001-12-26 | 2001-12-26 | タイヤの成形金型、及びそれによって製造された空気入りタイヤ |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1323512A2 EP1323512A2 (de) | 2003-07-02 |
EP1323512A3 EP1323512A3 (de) | 2004-09-01 |
EP1323512B1 true EP1323512B1 (de) | 2007-02-14 |
Family
ID=19188904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02028490A Expired - Fee Related EP1323512B1 (de) | 2001-12-26 | 2002-12-19 | Reifenformwerkzeug und Reifenherstellverfahren |
Country Status (5)
Country | Link |
---|---|
US (1) | US6932589B2 (de) |
EP (1) | EP1323512B1 (de) |
JP (1) | JP3996390B2 (de) |
CN (1) | CN1319712C (de) |
DE (1) | DE60218118T2 (de) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100443278C (zh) * | 2004-09-01 | 2008-12-17 | 象山巨象机模有限公司 | 轮胎模具及其制造方法 |
JP2006247921A (ja) * | 2005-03-09 | 2006-09-21 | Yokohama Rubber Co Ltd:The | タイヤ成形用金型及びそのタイヤ成形用金型により製造した空気入りタイヤ |
JP4331150B2 (ja) * | 2005-09-15 | 2009-09-16 | 住友ゴム工業株式会社 | 空気入りタイヤ |
CN100425434C (zh) * | 2006-06-09 | 2008-10-15 | 孙康华 | 发泡童车胎的差压成型法及成型模 |
JP4811580B2 (ja) * | 2006-06-12 | 2011-11-09 | 横浜ゴム株式会社 | 空気入りタイヤ |
US20080093010A1 (en) * | 2006-10-17 | 2008-04-24 | Bridgestone Firestone North America Tire, Llc | Method for designing the fundamental pitch for a tire tread pattern with variable lug count by rib |
USD630997S1 (en) | 2010-08-26 | 2011-01-18 | Bridgestone Americas Tire Operations, Llc | Tire tread |
US8731871B2 (en) | 2010-09-22 | 2014-05-20 | Bridgestone Americas Tire Operations, Llc | Tire mold design method to minimize unique annular mold parts |
FR2969956B1 (fr) * | 2010-12-30 | 2013-02-08 | Michelin Soc Tech | Moule de vulcanisation pour la vulcanisation et le moulage d'un pneumatique |
JP5342580B2 (ja) * | 2011-02-28 | 2013-11-13 | 住友ゴム工業株式会社 | 空気入りタイヤ |
FR3024074B1 (fr) * | 2014-07-25 | 2016-09-02 | Michelin & Cie | Moule de vulcanisation pour pneumatique a fermeture optimisee |
WO2016209690A1 (en) | 2015-06-25 | 2016-12-29 | Uop Llc | Chemically and uv cross-linked high selectivity polyimide membranes for gas separations |
JP6582864B2 (ja) * | 2015-10-21 | 2019-10-02 | 住友ゴム工業株式会社 | 金型洗浄用カバーの製造方法 |
MY186087A (en) | 2015-10-22 | 2021-06-21 | Uop Llc | Dual layer-coated membranes for gas separations |
MY186035A (en) | 2015-11-20 | 2021-06-15 | Uop Llc | High selectivity copolyimide membranes for separations |
US10471381B2 (en) | 2016-06-09 | 2019-11-12 | Uop Llc | High selectivity facilitated transport membranes and their use for olefin/paraffin separations |
JP6824677B2 (ja) * | 2016-09-27 | 2021-02-03 | Toyo Tire株式会社 | 空気入りタイヤ |
US10569218B2 (en) | 2016-11-17 | 2020-02-25 | Uop Llc | Multiple membrane separation process using glassy polymeric membrane and rubbery polymeric membrane |
US10052582B1 (en) | 2017-03-29 | 2018-08-21 | Uop Llc | Super high permeance and high selectivity rubbery polymeric membranes for separations |
US10328386B2 (en) | 2017-05-18 | 2019-06-25 | Uop Llc | Co-cast thin film composite flat sheet membranes for gas separations and olefin/paraffin separations |
US10569233B2 (en) | 2017-06-06 | 2020-02-25 | Uop Llc | High permeance and high selectivity facilitated transport membranes for olefin/paraffin separations |
US10751670B2 (en) | 2017-08-24 | 2020-08-25 | Uop Llc | High selectivity facilitated transport membrane comprising polyethersulfone/polyethylene oxide-polysilsesquioxane blend membrane for olefin/paraffin separations |
US10427997B2 (en) | 2017-12-27 | 2019-10-01 | Uop Llc | Modular membrane system and method for olefin separation |
CN108162256B (zh) * | 2017-12-29 | 2020-05-22 | 山东豪迈机械科技股份有限公司 | 一种轮胎模具侧板及轮胎模具 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5658817A (en) * | 1979-10-18 | 1981-05-22 | Bridgestone Corp | Dividing method of ring shaped metal mold and cutting apparatus therefor |
JPS60189611A (ja) * | 1984-03-08 | 1985-09-27 | Toyo Tire & Rubber Co Ltd | 低騒音空気入りタイヤ |
JP2824052B2 (ja) * | 1986-12-25 | 1998-11-11 | 株式会社ブリヂストン | 重荷重用ラジアルタイヤ |
US5120209A (en) * | 1989-12-29 | 1992-06-09 | Macmillan Kenneth T | Apparatus for molding tire treads |
IT1240295B (it) * | 1990-04-13 | 1993-12-07 | Pirelli | Stampo e metodo per la vulcanizzazione di pneumatici e metodo per fabbricare stampi |
JPH0840017A (ja) * | 1994-06-21 | 1996-02-13 | Michelin Rech & Technique Sa | タイヤ、トレッドバンドのピッチ変化方法、及び金型セグメント |
JPH08216154A (ja) * | 1995-02-16 | 1996-08-27 | Bridgestone Corp | 空気入りラジアルタイヤの製造方法及びそれに用いるブラダー |
CA2180770A1 (en) * | 1996-03-11 | 1997-09-12 | Bill Joe Ratliff, Jr. | Tire sidewall mosaic design patterns |
FR2759323B1 (fr) * | 1997-02-12 | 1999-03-19 | Michelin & Cie | Sculpture de bande de roulement et procede de fabrication |
JP3749348B2 (ja) * | 1997-05-06 | 2006-02-22 | 株式会社ブリヂストン | タイヤ用加硫金型 |
JP3987209B2 (ja) * | 1998-07-27 | 2007-10-03 | 東洋ゴム工業株式会社 | 空気入りタイヤ |
JP3238376B2 (ja) * | 1998-12-28 | 2001-12-10 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP3391756B2 (ja) * | 1999-12-07 | 2003-03-31 | 住友ゴム工業株式会社 | 空気入りタイヤ |
-
2001
- 2001-12-26 JP JP2001394749A patent/JP3996390B2/ja not_active Expired - Fee Related
-
2002
- 2002-12-19 DE DE60218118T patent/DE60218118T2/de not_active Expired - Lifetime
- 2002-12-19 EP EP02028490A patent/EP1323512B1/de not_active Expired - Fee Related
- 2002-12-26 US US10/328,015 patent/US6932589B2/en not_active Expired - Fee Related
- 2002-12-26 CN CNB021597855A patent/CN1319712C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6932589B2 (en) | 2005-08-23 |
DE60218118D1 (de) | 2007-03-29 |
US20030140997A1 (en) | 2003-07-31 |
EP1323512A3 (de) | 2004-09-01 |
JP2003191243A (ja) | 2003-07-08 |
DE60218118T2 (de) | 2007-06-06 |
CN1319712C (zh) | 2007-06-06 |
CN1428229A (zh) | 2003-07-09 |
EP1323512A2 (de) | 2003-07-02 |
JP3996390B2 (ja) | 2007-10-24 |
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